EP1860655A3 - Optical disc apparatus - Google Patents

Optical disc apparatus Download PDF

Info

Publication number
EP1860655A3
EP1860655A3 EP07009245A EP07009245A EP1860655A3 EP 1860655 A3 EP1860655 A3 EP 1860655A3 EP 07009245 A EP07009245 A EP 07009245A EP 07009245 A EP07009245 A EP 07009245A EP 1860655 A3 EP1860655 A3 EP 1860655A3
Authority
EP
European Patent Office
Prior art keywords
optical
optical path
interference
optical system
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07009245A
Other languages
German (de)
French (fr)
Other versions
EP1860655B1 (en
EP1860655A2 (en
Inventor
Takeshi Shimano
Harukazu Miyamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP1860655A2 publication Critical patent/EP1860655A2/en
Publication of EP1860655A3 publication Critical patent/EP1860655A3/en
Application granted granted Critical
Publication of EP1860655B1 publication Critical patent/EP1860655B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1362—Mirrors
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

Provided is an optical disc apparatus including an interference-type optical disk signal detection system, which allows an optical path difference between two kinds of light to be controlled easily, which has a high signal amplification effect, and which is suitable for miniaturization of an optical system. An interference-type optical system is integrally formed to stabilize an optical path difference between signal light and reference light. At the same time, means for controlling an optical path length of the reference light is attached to a reference mirror (114), and thereby controls signal amplitude so as to be constantly set the maximum in response to a change in the optical path length with time due to a variation in the thickness of a cover layer of an optical disk, a temperature and the like. Moreover, the optical system is miniaturized by using a Twyman-Green type interference optical system.
EP07009245A 2006-05-25 2007-05-08 Optical disc apparatus Expired - Fee Related EP1860655B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006144744A JP2007317284A (en) 2006-05-25 2006-05-25 Optical disk device

Publications (3)

Publication Number Publication Date
EP1860655A2 EP1860655A2 (en) 2007-11-28
EP1860655A3 true EP1860655A3 (en) 2008-01-23
EP1860655B1 EP1860655B1 (en) 2011-01-26

Family

ID=38430531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07009245A Expired - Fee Related EP1860655B1 (en) 2006-05-25 2007-05-08 Optical disc apparatus

Country Status (6)

Country Link
US (2) US7715287B2 (en)
EP (1) EP1860655B1 (en)
JP (1) JP2007317284A (en)
KR (1) KR100841836B1 (en)
CN (1) CN100474420C (en)
DE (1) DE602007012169D1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101022099B1 (en) * 2005-02-04 2011-03-17 엘지전자 주식회사 Compensating device of spherical aberration for optical pickup
US8713181B2 (en) * 2007-08-03 2014-04-29 International Business Machines Corporation Method for transferring inventory between virtual universes
JP5171219B2 (en) * 2007-11-15 2013-03-27 三洋電機株式会社 Optical pickup device and optical reproduction device
JP5153424B2 (en) * 2008-04-11 2013-02-27 株式会社日立製作所 Optical head and optical disk apparatus
JP5081763B2 (en) * 2008-08-13 2012-11-28 株式会社日立メディアエレクトロニクス Optical information detection method, optical pickup, and optical information recording / reproducing apparatus
JP5452040B2 (en) * 2009-03-13 2014-03-26 日立コンシューマエレクトロニクス株式会社 Optical information reproducing method, optical head, and optical disc apparatus
JP5309008B2 (en) 2009-12-15 2013-10-09 日立コンシューマエレクトロニクス株式会社 Optical information recording / reproducing apparatus and optical information reproducing apparatus
CN103038826A (en) 2011-06-17 2013-04-10 松下电器产业株式会社 Modulated signal detection device and method of detecting modulated signal
JP6153009B2 (en) 2011-08-30 2017-06-28 パナソニックＩｐマネジメント株式会社 Modulation signal detection apparatus and modulation signal detection method
JP6167405B2 (en) 2012-04-02 2017-07-26 パナソニックＩｐマネジメント株式会社 Optical pickup and optical disc apparatus
CN109633668B (en) * 2018-12-26 2021-01-15 中国科学院长春光学精密机械与物理研究所 Laser distance measuring device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438042A2 (en) * 1990-01-16 1991-07-24 International Business Machines Corporation Utilizing wasted laser light in optical systems
EP0572981A1 (en) * 1992-06-02 1993-12-08 Nec Corporation Phase-change type optical disk device and optical head to be used therein
JPH06223433A (en) * 1993-01-29 1994-08-12 Nippon Hoso Kyokai <Nhk> Method and device for detecting magneto-optical signal

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5804814A (en) * 1994-05-20 1998-09-08 Musha; Toru Optical pick-up head and integrated type optical unit for use in optical pick-up head
US5233582A (en) * 1991-02-19 1993-08-03 Pioneer Electronic Corporation Optical waveguide recording medium playing apparatus
JPH04265534A (en) * 1991-02-19 1992-09-21 Naohiro Tanno Optical waveguide recording medium reproducing device
JP2769393B2 (en) * 1991-04-26 1998-06-25 直弘 丹野 3D optical recording device
JP3057903B2 (en) 1992-06-04 2000-07-04 株式会社日立製作所 Magneto-optical disk drive
JP2783397B2 (en) * 1992-09-24 1998-08-06 シャープ株式会社 Optical recording information reading device and reading method
JP3162842B2 (en) * 1992-11-18 2001-05-08 三洋電機株式会社 Optical information reproducing device
US5729510A (en) * 1994-01-19 1998-03-17 Kabushiki Kaisha Toshiba Optical head used for recording on optical recording medium having various thicknesses, warpage and the like
JP3660415B2 (en) * 1995-02-07 2005-06-15 富士通株式会社 Optical device for optical storage device
JPH0935284A (en) * 1995-07-17 1997-02-07 Fujitsu Ltd Optical disk device
ID15863A (en) * 1996-02-01 1997-08-14 Mitsubishi Rayon Co SURFACE LIGHT SOURCE DEVICES, AND CRYSTAL LIQUID DISPLAY DEVICES, SIGNATURE SHOW EQUIPMENT AND TRAFFIC SIGNING EQUIPMENT USING TRAFFIC LIGHT SOURCE DEVICES
KR100189911B1 (en) * 1996-05-15 1999-06-01 윤종용 Apparatus for optical disc drive servo and the method thereof
DE19638878A1 (en) * 1996-09-23 1998-03-26 Thomson Brandt Gmbh Recording or reproducing apparatus for recording on or reproducing from an optical recording medium
US6181666B1 (en) * 1996-10-21 2001-01-30 Olympus Optical Company, Ltd. Optical pickup
KR100478559B1 (en) * 1997-08-29 2005-07-21 삼성전자주식회사 Optical pickup for recordable and playable discs
US5883875A (en) * 1997-09-02 1999-03-16 International Business Machines Corporation Short coherent-length optical tomograph for high density volume optical data storage devices
US6229771B1 (en) * 1998-10-09 2001-05-08 Zen Research (Ireland), Ltd. Method and apparatus for generating focus error signals in a multi-beam optical disk drive
JP3782916B2 (en) * 2000-02-18 2006-06-07 富士通株式会社 Optical information storage device and optical element
US20020036958A1 (en) * 2000-07-24 2002-03-28 Hidenori Wada Optical element, optical head, optical recording/reproducing apparatus and optical recording/reproducing method
JP3639202B2 (en) 2000-07-05 2005-04-20 株式会社オプトウエア Optical information recording apparatus and method, optical information reproducing apparatus and method, and optical information recording and reproducing apparatus and method
TW591248B (en) * 2001-05-12 2004-06-11 Samsung Electronics Co Ltd Many-sided reflection prism and optical pickup
TW200306550A (en) * 2002-03-29 2003-11-16 Matsushita Electric Ind Co Ltd Optical pick-up apparatus and optical disc apparatus
JP2004022083A (en) 2002-06-18 2004-01-22 Optware:Kk Optical pickup device
JP2004030734A (en) 2002-06-24 2004-01-29 Optware:Kk Optical pickup device
CN1300777C (en) * 2003-10-17 2007-02-14 上海乐金广电电子有限公司 Interference removing apparatus and method for focusing error signal and tracking error signal
JP2007213755A (en) * 2006-01-13 2007-08-23 Sony Corp Optical disk device, an optical pickup device, and method for suppressing astigmatism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438042A2 (en) * 1990-01-16 1991-07-24 International Business Machines Corporation Utilizing wasted laser light in optical systems
EP0572981A1 (en) * 1992-06-02 1993-12-08 Nec Corporation Phase-change type optical disk device and optical head to be used therein
JPH06223433A (en) * 1993-01-29 1994-08-12 Nippon Hoso Kyokai <Nhk> Method and device for detecting magneto-optical signal

Also Published As

Publication number Publication date
US7715287B2 (en) 2010-05-11
EP1860655B1 (en) 2011-01-26
CN100474420C (en) 2009-04-01
US20070274171A1 (en) 2007-11-29
JP2007317284A (en) 2007-12-06
US20100188961A1 (en) 2010-07-29
US7911889B2 (en) 2011-03-22
EP1860655A2 (en) 2007-11-28
KR20070113960A (en) 2007-11-29
KR100841836B1 (en) 2008-06-27
DE602007012169D1 (en) 2011-03-10
CN101079282A (en) 2007-11-28

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